Means for cooling furnace-walls.



L. L. KNOX.

MEANS FOR 000mm} FURNACE WALLS.

APPLICATION FILED OCT. 10, 190B.

Patented Apr. 20, 1909.

WITNESSES UNITED STATES PATENT FFIQE;

LUTHER L. KNOX, PITTSBURG, PENNSYLVANIA, ASSIGNORXFO KEYSTONE FURNACE CON- STRUGTION COUPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF PENNSYL- VAN IA.

To all whom it may concern;

Be it knovvn that l, Lorin-tn L. Knox, of Pittsburg, Allegheny county, Pennsylvania, have invented a new and useful Improvementin Means for (ooling l urnnce-is'alls, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in \vhich- Figure 1 is a side elevation of a portion of the side wall of an open hearth furnace sl'iov; ing the application of my invent-ion thereto; Fig. 2 is a section on the line 1l-ll of Fig. 1 Figs. 3 and 4 are detail views of one of the boxes or castings. I y

The object of my invention is to provide a novel arrangement of cooling boxes or castings in the walls of the furnaces and furnace ports for the purpose of reventing the rapid destruction of the same y the cutting action of v the hot gases, and further to provide means for facilitating the insertion and removal of the boxes from the furnace or port wall in which they areplaced.

The nature of my invention vrill be best understood by reference to the acconnmnying drawings, in which I have sheen one form thereof ap'ilied' to an open hearth furnace, and which will now be dcscriljicd, it being premised, however, that the invention is capable of use in other classes of furnaces and that-the details'of construction and arrangernent may be changed Without departing from the spirit and scope of the invention.

Referring to: these drawings, the numerai 2 designates the boxes or castings which, as shown, are of Wedge-shape in crossscctions, being Wider at their outer than at their inner ends. Each box or casting is provided at one end, preferably at its low point with an inlet connection 3 for the cooling Water, and i at its opposite end, preferably at its highest point, With an outlet conneti 4. The interior of the box may be provided vsith any suitable arrangement of halliin; F, causing a most effective circulation ol the water thercthrough. To receive these boxes or castit the furnace or port wall is provided open chambers or pockets l? extending purtlally through the wall, and preferably of substantially uniform cross-section. hen the boxes are placed in these chambers or pockets, spaces will he left at op )osite sides thereof at the inner portions of the pockets,

Specification of Letters Patent. Application filed October 10, 1908.

MEANS FOR COOLING FURNACE-"WALLS.

Patented April 20, 1909. Serial No 157,133.

- section described, the volume of water contained \Htlllli each box may be Inaderelativelv large without unduly increasing thecooling area of their inner-ends. That is to say, the area of the inner ends of the boxes while suilicien t to effectively checktand re,- tard the cutting action of the hot-gases, is not suiliciontly large to cause an undue chilling of the furnace walls and the consequent chilling or lov. ering of the temperature of the furnace; nhile there is in each box a. volume of water suiiicient to absorb and carry if a large quantity of heat.

lsyiniakmg the pockets or chambers o uniform section, instead of to closelyfit the section of the boxes, and then filling these spaces with sand or other refractory material, the construction of the furnace is simplified, since the cutting or breaking of the bricks in the forunition of these pockets is avoided,

The provision of sand or other'rcfractory material also provides means for ooinpenstating for the dill'erent relative ex Jansion, and contraction, n ovei'incnts of the oxes or castings in the wall of the furnace; and the tapered form of the boxes also facilitates their insertion and removal so that they can be readily replaced, when necessary.

Each of the boxes is also preferably pro video with one or more eyes or lugs S at its outer end, for the engagement therewith of a hook or other implement for removing boxes.

As before stat l, the boxes can he placed either horizonl. .lly or vertically in the furnace wall, but preferably they will in. all cases he so locate l that the cold water will enter at the lowest point ol'the box, and the heated n ater will escape at its highest point, thereby"providing for a most ell'ectivc ciroula tion thorethrough and avoiding; the formation of steam pockets. The spacing of the boxes will therefore be determined by the thickness of the port walls in which they are 

